This type of argument does not explain how to solve hard decisions, it simply says that if you know impact of each choice is similar, it is a simple decision.

This type of argument does not explain how to solve hard decisions, it simply says that if you know impact of each choice is similar, it is a simple decision. There are endless ways for a decision to actually be hard. One is where the type of impact between options is different and difficult to compare. The difficulty may arise due to: uncertainty, complexity, lack of knowledge, value judgements, brutal trade-offs etc. i) "Should I stay to treat to the ebola victim or leave with my family?" is hard because it involves value judgements, predictions, risks. It questions who you are. ii) "Should our startup be tightly integrated with facebook?" is hard because the potential impact is massive and requires substantial investigation to understand. The very attempt to compare options can involve costs and feedback loops e.g. should I pay for an investigation, should I prototype this, should I wait for more info etc. The actions you take to compare options can change the available options. A single decision becomes a nested web of other decisions. In the most general sense, making a decision is like devising a strategy. Is creating a good strategy easy or hard? p.s. I'm working on this problem